Appendix D Traffic Impact Analysis - westplainseis.com

2032 Alternative 2 Mitigations:
Hwy 2 / Craig: Install traffic signal and widen/improve intersection approaches to include
dedicated NB and SB left turn lanes. Alternatively, consider installation of a roundabout.
Project Proportional Share: 22.5%
Resulting LOS & Delay (sec): F/109.7 / D/54.3 (roundabout)
Hwy 2 / Lundstrom: Restripe and widen approaches to accommodate exclusive NB and SB right
turn lanes. Consider restricting NB/SB left turns and adding EB/WB right turn lanes.
Project Proportional Share: 18.9%
Resulting LOS & Delay (sec): D/34.1
Hwy 2 / Lawson: Modify the signal timing. Add EB/WB right turn lanes, reconfigure N/S
approaches.
Project Proportional Share: 18.6%
Resulting LOS & Delay (sec): D/37.4
Hwy 2 / Garfield: Optimize signal timing. Add EB right turn lane, add separate NB left turn lane,
reconfigure SB approach.
Project Proportional Share: 14.8%
Resulting LOS & Delay (sec): E/57.2
Hwy 2 / Hayford: Convert the inside SB thru land to a 2 nd SB left turn lane and optimize signal
timing.
Project Proportional Share: 10.9%
Resulting LOS & Delay (sec): F/147.0
Craig / SR 902: Install traffic signal or consider installation of a roundabout.
Project Proportional Share: 20.2%
Resulting LOS & Delay (sec): B/18.2 / B/11.6
Craig / Sixth Ave.: Widen the intersection approach to provide and exclusive NB right turn lane.
Project Proportional Share: 25.6%
Resulting LOS & Delay (sec): D/28.5
Hwy 2 / Fairchild AFB: Modify signal timing. Add NB left turn lane and WB thru lane.
Project Proportional Share: 8.2%
Resulting LOS & Delay (sec): D/50.6
Hwy 2 / Middle Driveway: Install traffic signal and approach improvements (SB Middle
Driveway); install a WB right turn lane. Alternatively, consider installation of a roundabout.
Project Proportional Share: 100%
Resulting LOS & Delay (sec): D/46.8 / E/65.8 (roundabout)
2032 Alternative 3 Mitigations:
Hwy 2 / Craig: Install traffic signal and widen/improve intersection approaches to include
dedicated NB and SB left turn lanes. Alternatively, consider installation of a roundabout.
Project Proportional Share: 19.5%
Resulting LOS & Delay (sec): F/90.3 / D/42.8 (roundabout)
Hwy 2 / Lundstrom: Restripe and widen approaches to accommodate exclusive NB and SB right
turn lanes. Consider restricting NB/SB left turns and adding EB/WB right turn lanes.
Project Proportional Share: 16.3%
Resulting LOS & Delay (sec): D/32.4
Hwy 2 / Lawson: Modify the signal timing. Reconfigure N/S approaches.
Project Proportional Share: 16.0%
Resulting LOS & Delay (sec): D/37.0
Hwy 2 / Garfield: Optimize signal timing. Add EB right turn lane, add separate NB left turn lane,
reconfigure SB approach.
Project Proportional Share: 12.7%
West Plains Development – Spokane Tribe Page | 85
Traffic Impact Analysis April 28, 2011